Effect of presowing seed treatments on teak (Tectona grandis L. F) drupes dormancy and germination

Poor seed germination is a major issue in teak (Tectona grandis) propagation. Teak dormancy thought to be the reason for delayed germination. So far, specific mechanisms have not yet been identified. In order study influence of presowing treatments on germination, seedling vigour, and biochemical attributes fresh drupes collected from production area Top Slip Tamil Nadu. The were subjected different viz., T1 - control, T2 soaking drying 6 days, T3 – T18 (soaking 5 days + concentrations thiourea, potassium nitrate, hydrogen peroxide calcium oxychloride 12 hours). Treated placed earthen pots kept open sunlight. parallel, true seeds extracted untreated also under vitro conditions as check. A higher percentage (40%) was recorded when compared treated vivo conditions. Among sown conditions, given 2% (CaOCl2) (17.16) with better vigour. Analysis mesocarp extract high-performance liquid chromatography showed that gibberellic acid found only seeds, whereas other compounds, indole-3-acetic acid, indole butyric abscisic coumarin, present or mesocarp.